Power supply control apparatus including overcurrent detection circuit

A current detection circuit, comprising:

• a first potential supply terminal;
• a second potential supply terminal supplying a different potential from that of the first potential supply terminal;
• a first transistor of a first conductivity type coupled between the first potential supply terminal and a first node, and including a control terminal coupled to a first terminal;
• a second transistor of the first conductivity type coupled between the first potential supply terminal and a second node, and including a control terminal coupled to a second terminal;
• a third transistor of a second conductivity type coupled between the first node and a third terminal, and including a control terminal coupled to the second node;
• a fourth transistor of the second conductivity type coupled between the second node and the second potential supply terminal, and including a control terminal coupled to the second node;
• a power transistor coupled between a third potential supply terminal and the second potential supply terminal;
• a detection transistor coupled between the third potential supply terminal and the third terminal;
• and
• a resistive element coupled between the third terminal and the second potential supply terminal,
• wherein a reference voltage is supplied between the first terminal and the second terminal, a target voltage is generated between the third terminal and the second potential supply terminal, and a comparison result signal compared between the reference voltage and the target voltage is output from the first node.